<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<style type="text/css">
/*これだ*/
.これだ{
color:red;
}
#ssid{
color:yellow;
}
</style>
		<script>
$(function(){
	$(".これだ").css("color","green");
});
		</script>
</head>
<body class="これだ" id="ssid">
<div>あああ</div>
</body>
</html>